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Ignitron Mercury Arc Rectifier Tube from Japan

Ignitrons are large mercury arc rectifier tubes used for high-current DC power conversion in industrial applications like aluminum smelting. HTS 8540.89.00 includes these mercury vapor-filled tubes operating via cathode-initiated arc discharge.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

Import Tips

Mercury content declarations mandatory; special hazardous waste handling procedures

Ozone-depleting substances certification required for mercury vapor tubes

Legacy equipment replacement; verify if solid-state rectifiers under 8536 more appropriate

Ignitron Mercury Arc Rectifier Tube from Japan — Import Duty Rate | HTS 8540.89.00